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Subject: [Bug fortran/47730] [OOP] ICE on invalid source in connection with SELECT TYPE
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47730

--- Comment #2 from janus at gcc dot gnu.org 2011-02-14 10:27:23 UTC ---
(In reply to comment #0)
> It seems related to bug #46849

Yes, in particular to comment #2 in that PR:

module m
  implicit none
  type :: dt
  end type
contains
  subroutine test(fun)
    class(dt) :: fun
    call extern(not_existing) ! Error: No implicit type
    select type (fun)
    type is (dt)          ! TYPE IS is required for the ICE
    end select
  end subroutine test
end module m


which gives:

    call extern(not_existing) ! Error: No implicit type
                            1
Error: Symbol 'not_existing' at (1) has no IMPLICIT type
f951: internal compiler error: in gfc_enforce_clean_symbol_state, at
fortran/symbol.c:3426


Same pattern: Some error, and afterwards an ICE in
'gfc_enforce_clean_symbol_state'.